<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    //  输出100以内的所有质数
    var prime;
    for (var i = 2; i <= 100; i++) {
      prime = true;
      for (var j = 2; j < i; j++) {
        if (i % j == 0) {
          prime = false;
        }
      }
      if (prime) {
        document.write(i + '、');
      }
      else{
        document.write('不是质数');
      }
    }
  </script>
</body>
</html>